EP0421182B1 - Air mixing device - Google Patents

Air mixing device Download PDF

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Publication number
EP0421182B1
EP0421182B1 EP90117912A EP90117912A EP0421182B1 EP 0421182 B1 EP0421182 B1 EP 0421182B1 EP 90117912 A EP90117912 A EP 90117912A EP 90117912 A EP90117912 A EP 90117912A EP 0421182 B1 EP0421182 B1 EP 0421182B1
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EP
European Patent Office
Prior art keywords
air
mixing
flow
mixer
guiding plates
Prior art date
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Application number
EP90117912A
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German (de)
French (fr)
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EP0421182A2 (en
EP0421182A3 (en
Inventor
Gerold Fleissner
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Truetzschler Nonwovens GmbH
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Fleissner GmbH
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Publication of EP0421182A3 publication Critical patent/EP0421182A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4315—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being deformed flat pieces of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43161—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod composed of consecutive sections of flat pieces of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B01F25/4316—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod
    • B01F25/43163—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor the baffles being flat pieces of material, e.g. intermeshing, fixed to the wall or fixed on a central rod in the form of small flat plate-like elements

Definitions

  • the invention relates to an air mixer which, in the flow direction of an at least partially heated air stream in a flow channel in front of a heat treatment chamber, for. B. arranged for drying textile webs and for mixing the air layers present in this air stream different temperatures is provided, for which purpose the air mixer from several arranged in parallel to each other, each over the entire cross section of the flow channel with in the direction of flow and inclined air deflection and swirl plates provided air mixing parts.
  • An air mixer of this type is known from JP-A-56-147 619. It consists of two air mixing parts arranged one behind the other, each consisting of a number of air deflection bodies extending in the flow direction, the inclination of which can be tilted and which are perpendicular to one another with respect to the two parts.
  • FR-A-0 609 643 discloses a further mixing device in which more than two such mixing parts are arranged one behind the other in the direction of flow and the deflection plates there are each inclined differently.
  • the large number of mixing parts is not decisive for the thorough mixing of the flow layers.
  • the invention has for its object to develop an air mixer with which hot and cooler air layers can be completely mixed with each other, namely over the entire cross section of a flow channel on the way z. B. to a heat treatment chamber in which only a uniformly heated amount of air should be available for the heat treatment of material webs.
  • the invention provides that three such air mixing parts are arranged one behind the other, the surface of at least one of the air mixing parts is divided in the middle with respect to the inclination of the air baffle plates and the two halves have air baffle plates, which are each inclined towards the center of the flow channel, and that the air baffle plates of an air mixing part are circular, that is to say funnel-shaped because of the inclination , arranged across the cross section of the air mixer and inclined towards the center of the flow channel.
  • Essential for complete mixing are the frequently changing directions of deflection and in particular the deflection of the air layers towards the center of the channel, so that the air boundary layers of the flow channel are also included in the mixing.
  • the air mixer consists of three air mixing parts arranged one behind the other, the first part consisting of sheets arranged in a circle, which - as said - must be arranged conically in order to direct the air into the middle of the air flow right at the start of the throughflow process Channel. Following this, only parallel plates should be provided however, in turn are aligned towards each other in their slant. A third part is then arranged in its sheets perpendicular to the upstream one, which ultimately results in complete mixing of the air flows without any remaining heat streaks.
  • the air mixer according to the invention has many possible uses. It can be used to mix layers of air with extremely different temperatures.
  • a through-flow dryer is shown, on the basis of which the construction of this air mixer is to be explained in more detail.
  • a through-flow or sieve drum dryer consists of a housing 1 which is completely closed and provided with an inlet and outlet and which is divided by a vertical wall 2 into a treatment room 3 and a fan room 4.
  • the fan chamber 4 can also be provided independently of this housing 1, with the result that the bearings of the screen drum 5 rotatably mounted in the treatment chamber 3 do not have to be arranged within the hot atmosphere.
  • a sieve fabric (not shown in the drawing) lies on the sieve drum 5, which is advantageous for a more uniform support of the textile material 6.
  • the sieve drum 5 is on the inside shielded from the suction by a cover 7.
  • the cover is shown here at a point where the textile material also rests on the screening drum, which is contradictory in this respect.
  • the cover should be offset by degrees.
  • a sieve cover 8 is provided in the treatment room 3, which is provided for generating an air backlog to even out the air flows to be flowed onto the sieve drum 5.
  • the radial fan 9 is rotatably mounted, which places the inside of the screen drum 5 under suction and accelerates the treatment air upwards for regeneration in a heating device 10.
  • the treatment air circulated in the circuit must be both accelerated and heated after each flow-through process.
  • a direct gas heater 10 is used.
  • amounts of air that can no longer be heated with a heater inside the housing 1 can be managed here.
  • the temperature required on the textile material 6 being between 120 and 300 ° C.
  • the heating gases that heat this circulating treatment air are between 800 and 900 ° C hot. A considerable effort is therefore necessary to distribute these hot combustion gases evenly with the circulated treatment air.
  • the circulating air accelerated upward in the direction of arrow 11 by the fan 9 flows toward the combustion tube 12.
  • a certain amount of exhaust air which is represented by the arrow 13
  • the fan 9 is supplied with fresh air 13 '.
  • the combustion gases generated by the burner 14 mix in the tube 12 with the circulating air accelerated by the fan 9. Due to the high temperature differences, special effort is required to mix the differently warm air streaks.
  • an air mixer 15 is required, which can be arranged at the end of the tube 12 just before the right-angled deflection 16 or afterwards. After this intensive mixing of the individual air components, the uniformly heated air then flows in via a channel 18 to the top of the screen drum or via channel 19 to the bottom of the screen drum.
  • the air mixer 15, according to Figures 2 and 3, consists of several air deflecting and swirling devices.
  • a plurality of sheets 17 extending in the flow direction are arranged across the entire flow channel 12 and are inclined in the flow direction, namely the respective sheets 17 are each aligned with the center of the flow channel 12, so that the air is blown to the left to the center on one half of the duct and the air to the right to the center is blown on the other half of the duct or in a subsequent air mixing section from top to bottom and from bottom to top.
  • the sheets 17 are arranged in a circle and aligned in a funnel shape. This in turn displaces the air in the middle of the flow channel so that the respective air flows meet on all sides in the middle.
  • the air mixer parts are arranged three times in succession.
  • the circular part is first provided in the air flow direction (arrows), where the metal sheets blow the air in a funnel shape into the center of the flow channel.
  • a part 22 then follows at a short distance 21, the sheets of which are oriented perpendicularly according to FIGS. 2 and 3 and blow the treatment air to the center of the treatment channel in each case due to their different inclination.
  • the third part 23 of the air mixer also has sheets arranged parallel to one another, which are inclined towards the center, but their orientation is perpendicular to the air mixing part 22, so that again a redirection of the treatment air and thus an intensive mixing is achieved.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
  • Air-Flow Control Members (AREA)
  • Processing Of Solid Wastes (AREA)
  • Incineration Of Waste (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

In dryers with gas heating, it is a particular problem uniformly to mix the combustion gases produced with the burner with the treatment air which is circulated in the circuit. In order to achieve this, a special construction of the air mixing device is envisaged, which consists of three parts arranged one behind another, the treatment air being in each part of different construction in each case deflected to the centre of the treatment duct and in this connection mixed with the air flows which originate from the sides. It is advantageous, firstly by means of a funnel-shaped air mixing part and then by means of such with sheets arranged parallel to one another, which are first arranged vertically and then transversely thereto, to create swirling in each case. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Luftmischer, der in Strömungsrichtung eines zumindest teilweise aufgeheizten Luftstromes in einem Strömungskanal vor einer Wärmebehandlungskammer z. B. zum Trocknen von textilen Warenbahnen angeordnet und zum Vermischen der in diesem Luftstrom vorhandenen Luftschichten unterschiedlicher Temperaturen vorgesehen ist, wozu der Luftmischer aus mehreren parallel zueinander angeordneten, sich jeweils über den ganzen Querschnitt des Strömungskanals mit in Strömungsrichtung und geneigt erstreckenden Luftablenkungs- und -verwirbelungsblechen versehenen Luftmischteilen besteht.The invention relates to an air mixer which, in the flow direction of an at least partially heated air stream in a flow channel in front of a heat treatment chamber, for. B. arranged for drying textile webs and for mixing the air layers present in this air stream different temperatures is provided, for which purpose the air mixer from several arranged in parallel to each other, each over the entire cross section of the flow channel with in the direction of flow and inclined air deflection and swirl plates provided air mixing parts.

Ein Luftmischer dieser Art ist aus der JP-A-56-147 619 bekannt. Er besteht aus zwei hintereinander angeordneten Luftmischteilen, die jeweils aus einer Anzahl von in Strömungsrichtung sich erstreckenden Luftablenkungskörpern bestehen, die in ihrer Neigung kippbar sind und bezüglich der beiden Teile senkrecht zueinander stehen. Durch die FR-A-0 609 643 ist eine weitere Mischvorrichtung bekannt, bei der noch mehr als zwei solcher Mischteile in Strömungsrichtung hintereinander angeordnet und die dortigen Ablenkungsbleche jeweils anders geneigt sind. Die große Anzahl der Mischteile ist aber nicht ausschlaggebend für die gute Durchmischung der Strömungsschichten. Hier hilft auch nicht der Luftmischer nach der US-A-4 495 858, dessen Luftablenkungsbleche radial ausgerichtet angeordnet sind und sich parallel zur Strömungskanalachse erstrecken.An air mixer of this type is known from JP-A-56-147 619. It consists of two air mixing parts arranged one behind the other, each consisting of a number of air deflection bodies extending in the flow direction, the inclination of which can be tilted and which are perpendicular to one another with respect to the two parts. FR-A-0 609 643 discloses a further mixing device in which more than two such mixing parts are arranged one behind the other in the direction of flow and the deflection plates there are each inclined differently. However, the large number of mixing parts is not decisive for the thorough mixing of the flow layers. The air mixer according to US Pat. No. 4,495,858, whose air deflection plates are arranged radially aligned and extend parallel to the flow channel axis, does not help here either.

Ausgehend von einem Luftmischer anfangs genannter Art liegt der Erfindung die Aufgabe zugrunde, einen Luftmischer zu entwickeln, mit dem heiße und kühlere Luftschichten vollständig miteinander vermischt werden können, und zwar über den ganzen Querschnitt eines Strömungskanals auf dem Wege z. B. zu einer Wärmebehandlungskammer, in der nur noch eine gleichmäßig aufgeheizte Luftmenge zur Wärmebehandlung von Warenbahnen zur Verfügung stehen soll.Starting from an air mixer initially mentioned type, the invention has for its object to develop an air mixer with which hot and cooler air layers can be completely mixed with each other, namely over the entire cross section of a flow channel on the way z. B. to a heat treatment chamber in which only a uniformly heated amount of air should be available for the heat treatment of material webs.

Zur Lösung der gestellten Aufgabe sieht die Erfindung vor, daß drei solche Luftmischteile hintereinander angeordnet sind, die Fläche zumindest eines der Luftmischteile bezüglich der Neigung der Luftleitbleche mittig unterteilt ist und die beiden Hälften Luftleitbleche aufweisen, die jeweils zur Mitte des Strömungskanals hin geneigt sind, und daß die Luftleitbleche eines Luftmischteils kreisförmig, also wegen der Neigung trichterförmig, über den Querschnitt des Luftmischers angeordnet und zur Mitte des Strömungskanals hin geneigt sind. Wesentlich zur vollständigen Durchmischung sind also die häufig wechselnen Ablenkungsrichtungen und insbesondere die Ablenkung der Luftschichten jeweils zur Mitte des Kanals hin, so daß auch die Luftrandschichten des Strömungskanals in die Durchmischung mit einbezogen werden.To achieve the object, the invention provides that three such air mixing parts are arranged one behind the other, the surface of at least one of the air mixing parts is divided in the middle with respect to the inclination of the air baffle plates and the two halves have air baffle plates, which are each inclined towards the center of the flow channel, and that the air baffle plates of an air mixing part are circular, that is to say funnel-shaped because of the inclination , arranged across the cross section of the air mixer and inclined towards the center of the flow channel. Essential for complete mixing are the frequently changing directions of deflection and in particular the deflection of the air layers towards the center of the channel, so that the air boundary layers of the flow channel are also included in the mixing.

Es hat sich als besonders vorteilhaft herausgestellt, wenn der Luftmischer aus drei hintereinander angeordneten Luftmischteilen besteht, wobei der erste Teil aus kreisförmig angeordneten Blechen besteht, die - wie gesagt - konisch angeordnet sein müssen, um gleich zu Beginn des Durchströmvorganges die Luft in die Mitte des Kanals zu lenken. Im Anschluß daran sollten lediglich parallel angeordnete Bleche vorgesehen sein, die jedoch wiederum aufeinander zu in ihrer Schräge ausgerichtet sind. Ein dritter Teil ist dann in seinen Blechen senkrecht zum vorgeordneten angeordnet, was letztlich eine vollständige Durchmischung der Luftströmungen ohne verbleibene Hitzeschlieren zum Ergebnis hat.It has proven to be particularly advantageous if the air mixer consists of three air mixing parts arranged one behind the other, the first part consisting of sheets arranged in a circle, which - as said - must be arranged conically in order to direct the air into the middle of the air flow right at the start of the throughflow process Channel. Following this, only parallel plates should be provided however, in turn are aligned towards each other in their slant. A third part is then arranged in its sheets perpendicular to the upstream one, which ultimately results in complete mixing of the air flows without any remaining heat streaks.

In der Zeichnung ist ein Ausführungsbeispiel der Vorrichtung nach der Erfindung dargestellt. Es zeigen:

Figur 1:
einen Schnitt quer durch einen Durchströmtrockner, der auf seiner Oberseite einen Brenner aufweist, in dem die Umluft mit neuen Heizgasen vermischt wird,
Figur 2:
die Draufsicht auf den Luftmischer mit drei nur teilweise sichtbaren unterschiedlichen Blechausrichtungen und
Figur 3:
in perspektivischer Darstellung der Luftmischer gemäß Figur 2 mit den drei hintereinander angeordneten Luftmischteilen.
In the drawing, an embodiment of the device according to the invention is shown. Show it:
Figure 1:
a section across a through-flow dryer, which has a burner on its top, in which the circulating air is mixed with new heating gases,
Figure 2:
the top view of the air mixer with three only partially visible sheet metal orientations and
Figure 3:
in a perspective view of the air mixer according to Figure 2 with the three air mixing parts arranged one behind the other.

Der erfindungsgemäße Luftmischer hat vielerlei Anwendungsmöglichkeiten. Mit ihm können Luftschichten mit extrem unterschiedlichen Temperaturen miteinander vermischt werden. Im Ausführungsbeispiel ist ein Durchströmtrockner dargestellt, anhand dessen die Konstruktion dieses Luftmischers näher erläutert werden soll.The air mixer according to the invention has many possible uses. It can be used to mix layers of air with extremely different temperatures. In the exemplary embodiment, a through-flow dryer is shown, on the basis of which the construction of this air mixer is to be explained in more detail.

Wie bekannt, besteht ein Durchström- oder Siebtrommeltrockner aus einem rundum geschlossenen und mit einem Ein- und Auslauf versehenen Gehäuse 1, das durch eine lotrechte Wandung 2 in einen Behandlungsraum 3 und einen Ventilatorraum 4 unterteilt ist. Der Ventilatorraum 4 kann auch unabhängig von diesem Gehäuse 1 vorgesehen sein, was zur Folge hat, daß die Lager der im Behandlungsraum 3 drehbar gelagerten Siebtrommel 5 nicht innerhalb der heißen Atmosphäre angeordnet sein müssen. Auf der Siebtrommel 5 liegt im allgemeinen ein in der Zeichnung nicht dargestelltes Siebgewebe auf, das für eine gleichmäßigere Auflage des Textilgutes 6 vorteilhaft ist. In dem Umfangsbereich, den das Textilgut 6 die Siebtrommel nicht bedeckt, ist die Siebtrommel 5 auf der Innenseite durch eine Abdeckung 7 gegen den Saugzug abgeschirmt. Die Abdeckung ist hier an einer Stelle dargestellt, an der auch das Textilgut auf der Siebtrommel aufliegt, was insofern widersprüchlich ist. Die Abdeckung soll hier um Winkelgrade versetzt sein. Oberhalb und unterhalb der Siebtrommel ist im Behandlungsraum 3 eine Siebdecke 8 vorgesehen, die zur Erzeugung eines Luftstaus zur Vergleichmäßigung der auf die Siebtrommel 5 zu strömenden Luftströmungen vorgesehen ist. Im Ventilatorraum 4 ist der Radialventilator 9 drehbar gelagert, der das Innere der Siebtrommel 5 unter Saugzug setzt und die Behandlungsluft nach oben zur Regeneration in einer Heizeinrichtung 10 beschleunigt.As is known, a through-flow or sieve drum dryer consists of a housing 1 which is completely closed and provided with an inlet and outlet and which is divided by a vertical wall 2 into a treatment room 3 and a fan room 4. The fan chamber 4 can also be provided independently of this housing 1, with the result that the bearings of the screen drum 5 rotatably mounted in the treatment chamber 3 do not have to be arranged within the hot atmosphere. In general, a sieve fabric (not shown in the drawing) lies on the sieve drum 5, which is advantageous for a more uniform support of the textile material 6. In the peripheral area that the textile material 6 does not cover the sieve drum, the sieve drum 5 is on the inside shielded from the suction by a cover 7. The cover is shown here at a point where the textile material also rests on the screening drum, which is contradictory in this respect. The cover should be offset by degrees. Above and below the sieve drum, a sieve cover 8 is provided in the treatment room 3, which is provided for generating an air backlog to even out the air flows to be flowed onto the sieve drum 5. In the fan chamber 4, the radial fan 9 is rotatably mounted, which places the inside of the screen drum 5 under suction and accelerates the treatment air upwards for regeneration in a heating device 10.

Die im Kreislauf umgewälzte Behandlungsluft muß nach jedem Durchströmungsvorgang sowohl beschleunigt als auch aufgeheizt werden. Dazu dient im Ausführungsbeispiel nach Figur 1 eine direkte Gasheizung 10. Je nach Konstruktion der Trommel und auch deren Größe sind hier Luftmengen zu bewältigen, die mit einer Heizung innerhalb des Gehäuses 1 nicht mehr aufzuheizen sind. Bei den hier üblichen Durchströmtrommelkonstruktionen sind etwa 100 m³ Luft/Sek. aufzuheizen, wobei die an dem Textilgut 6 verlangte Temperatur zwischen 120 und 300 °C liegt. Die diese im Kreislauf umgewälzte Behandlungsluft aufheizenden Heizgase sind aber zwischen 800 und 900 °C heiß. Es ist deshalb ein erheblicher Aufwand notwendig, um diese heißen Verbrennungsgase mit der umgewälzen Behandlungsluft gleichmäßig zu verteilen.The treatment air circulated in the circuit must be both accelerated and heated after each flow-through process. For this purpose, in the exemplary embodiment according to FIG. 1, a direct gas heater 10 is used. Depending on the design of the drum and also its size, amounts of air that can no longer be heated with a heater inside the housing 1 can be managed here. In the usual through-flow drum designs, about 100 m³ of air / sec. to heat up, the temperature required on the textile material 6 being between 120 and 300 ° C. The heating gases that heat this circulating treatment air are between 800 and 900 ° C hot. A considerable effort is therefore necessary to distribute these hot combustion gases evenly with the circulated treatment air.

Beim Ausführungsbeispiel strömt die von dem Ventilator 9 nach oben in Richtung des Pfeiles 11 beschleunigte Umwälzluft dem Verbrennungsrohr 12 zu. Auf der Druckseite ist eine gewisse Menge Abluft, die durch den Pfeil 13 dargestellt ist, aus dem Kreislauf zu entfernen, während auf der Unterdruckseite dem Ventilator 9 Frischluft 13′ zugeführt wird. Die durch den Brenner 14 erzeugten Verbrennungsgase vermischen sich in dem Rohr 12 mit der von dem Ventilator 9 beschleunigten Umluft. Aufgrund der hohen Temperaturunterschiede ist ein besonderer Aufwand notwendig, um die unterschiedlich warmen Luftschlieren miteinander zu vermischen. Dazu ist gemäß der dargestellten Konstruktion ein Luftmischer 15 erforderlich, der am Ende des Rohres 12 kurz vor der rechtwinkligen Umlenkung 16 oder im Anschluß daran, angeordnet sein kann. Nach dieser hier erfolgenden intensiven Vermischung der einzelnen Luftbestandteile strömt dann die gleichmäßig aufgeheizte Luft über einen Kanal 18 der Oberseite der Siebtrommel oder über den Kanal 19 der Unterseite der Siebtrommel zu.In the exemplary embodiment, the circulating air accelerated upward in the direction of arrow 11 by the fan 9 flows toward the combustion tube 12. On the pressure side, a certain amount of exhaust air, which is represented by the arrow 13, is to be removed from the circuit, while on the vacuum side the fan 9 is supplied with fresh air 13 '. The combustion gases generated by the burner 14 mix in the tube 12 with the circulating air accelerated by the fan 9. Due to the high temperature differences, special effort is required to mix the differently warm air streaks. This is according to the construction shown, an air mixer 15 is required, which can be arranged at the end of the tube 12 just before the right-angled deflection 16 or afterwards. After this intensive mixing of the individual air components, the uniformly heated air then flows in via a channel 18 to the top of the screen drum or via channel 19 to the bottom of the screen drum.

Der Luftmischer 15, nach den Figuren 2 und 3, besteht aus mehreren Luftablenkungs- und Verwirbelungseinrichtungen. Um eine gleichmäßige Vermischung der Luftschlieren zu erzeugen, ist quer über den gesamten Strömungskanal 12 eine Vielzahl von in Strömungsrichtung sich erstreckenden Blechen 17 angeordnet, die in Strömungsrichtung geneigt sind, und zwar sind die jeweiligen Bleche 17 jeweils zur Mitte des Strömungskanals 12 ausgerichtet, so daß auf der einen Hälfte des Kanals die Luft nach links zur Mitte und auf der anderen Hälfte des Kanals die Luft nach rechts zur Mitte oder in einem folgenden Luftmischteil von oben nach unten und von unten nach oben geblasen wird. In einer dritten Möglichkeit sind die Bleche 17 kreisförmig angeordnet und trichterförmig ausgerichtet. Dadurch wird wiederum die Luft in die Mitte des Strömungskanals verlagert, so daß sich dort die jeweiligen Luftströme aller Seiten in der Mitte treffen.The air mixer 15, according to Figures 2 and 3, consists of several air deflecting and swirling devices. In order to produce a uniform mixing of the air streaks, a plurality of sheets 17 extending in the flow direction are arranged across the entire flow channel 12 and are inclined in the flow direction, namely the respective sheets 17 are each aligned with the center of the flow channel 12, so that the air is blown to the left to the center on one half of the duct and the air to the right to the center is blown on the other half of the duct or in a subsequent air mixing section from top to bottom and from bottom to top. In a third possibility, the sheets 17 are arranged in a circle and aligned in a funnel shape. This in turn displaces the air in the middle of the flow channel so that the respective air flows meet on all sides in the middle.

Es hat sich als vorteilhaft herausgestellt, wenn die Luftmischerteile dreifach hintereinander angeordnet sind. Im Ausführungsbeispiel ist dazu in der Luftströmungsrichtung (Pfeile) zuerst der kreisförmige Teil vorgesehen, wo die Bleche trichterförmig die Luft in die Mitte des Strömungskanals blasen. Mit kurzem Abstand 21 folgt dann ein Teil 22, dessen Bleche gemäß Figur 2 und 3 lotrecht ausgerichtet sind und die Behandlungsluft jeweils zur Mitte des Behandlungskanals aufgrund ihrer unterschiedlichen Neigung blasen. Der dritte Teil 23 des Luftmischers weist ebenfalls parallel zueinander angeordnete Bleche auf, die zur Mitte hin geneigt sind, jedoch ist deren Ausrichtung senkrecht zum Luftmischteil 22, so daß wiederum eine erneute Umlenkung der Behandlungsluft und damit eine intensive Mischung erzielt wird.It has proven to be advantageous if the air mixer parts are arranged three times in succession. In the exemplary embodiment, the circular part is first provided in the air flow direction (arrows), where the metal sheets blow the air in a funnel shape into the center of the flow channel. A part 22 then follows at a short distance 21, the sheets of which are oriented perpendicularly according to FIGS. 2 and 3 and blow the treatment air to the center of the treatment channel in each case due to their different inclination. The third part 23 of the air mixer also has sheets arranged parallel to one another, which are inclined towards the center, but their orientation is perpendicular to the air mixing part 22, so that again a redirection of the treatment air and thus an intensive mixing is achieved.

Claims (3)

  1. Air mixer, disposed in the direction of flow of an at least partly heated air stream in a flow duct preceding a heat treatment chamber, e.g. for drying textile web strips, and provided for mixing the air layers of different temperatures present in this air stream, for which purpose the air mixer comprises a plurality of air-mixing components, disposed parallel to one another and extending across the entire cross-section of the flow duct, and provided with air-deflection and turbulence plates extending in the direction of flow and in an inclined manner, characterised in that three such air-mixing parts (20, 22, 23) are disposed in sequence, the surface of at least one of the air-mixing parts (20, 22, 23) is centrally subdivided with respect to the inclination of the air-guiding plates (17), and the two halves have air-guiding plates (17) which are each inclined towards the centre of the flow duct (12), and in that the air-guiding plates (17) of one air-mixing part (20) are disposed circularly, i.e. in a funnel shape because of the inclination, above the cross-section of the air mixer (20), and are inclined towards the centre of the flow duct (12).
  2. Air mixer according to claim 1, characterised in that the air-guiding plates (17) of the air mixing parts (20, 22, 23) arranged in sequence have different inclinations.
  3. Air mixer according to one of claims 1 or 2, characterised in that, in the direction of flow of the air to be mixed, firstly the circular air mixing part (20) of the air mixer and then, if necessary with a short interval (21), an air mixing part (22) is provided, with air-guiding plates (17) disposed parallel to one another and respectively inclined towards the centre, which is in turn followed in the direction of flow, if necessary with a short interval (21), by the third air mixing part (23), whose air-guiding plates (17) are oriented vertically towards the preceding air mixing part (22).
EP90117912A 1989-09-30 1990-09-18 Air mixing device Expired - Lifetime EP0421182B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3932837A DE3932837A1 (en) 1989-09-30 1989-09-30 AIR MIXER
DE3932837 1989-09-30

Publications (3)

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EP0421182A2 EP0421182A2 (en) 1991-04-10
EP0421182A3 EP0421182A3 (en) 1991-11-27
EP0421182B1 true EP0421182B1 (en) 1994-08-03

Family

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EP90117912A Expired - Lifetime EP0421182B1 (en) 1989-09-30 1990-09-18 Air mixing device

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US (1) US5150535A (en)
EP (1) EP0421182B1 (en)
JP (1) JP2829324B2 (en)
AT (1) ATE109372T1 (en)
DE (2) DE3932837A1 (en)
DK (1) DK0421182T3 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5915813A (en) * 1996-05-21 1999-06-29 Fort James Corporation Apparatus and method for drying a wet web and modifying the moisture profile thereof
DE19720065C1 (en) * 1997-05-14 1998-12-17 Helmut Fresenberger Oven for drying painted samples
DE19806427A1 (en) * 1998-02-17 1999-08-19 Fleissner Maschf Gmbh Co Air mixer for static mixing of two air flows
DK1170054T3 (en) * 2000-06-19 2003-06-23 Balcke Duerr Gmbh Mixer for mixing gases and other Newtonian fluids
US6431859B1 (en) 2001-01-12 2002-08-13 North American Manufacturing Company Combustion gas and air recovery apparatus
US7448147B2 (en) 2004-11-22 2008-11-11 Metso Paper Usa, Inc. Nozzle insert for a Yankee impingement hood
DE102005017187B4 (en) * 2005-04-13 2007-06-21 Lindauer Dornier Gmbh Continuous dryers in multi-day construction, especially for plate-shaped products
IT1399461B1 (en) * 2010-04-13 2013-04-19 Unitech Textile Machinery Spa Stenter.
DE102011113837A1 (en) * 2011-09-21 2013-03-21 Trützschler Nonwovens Gmbh Heating system for heating a gaseous treatment medium for a dryer
CN106268401A (en) * 2016-09-26 2017-01-04 重庆方浩建筑保温材料有限公司万盛分公司 A kind of warming plate microgranule uniform mixing feed device
CN106582411B (en) * 2016-11-30 2019-02-15 重庆大学 A kind of mixing method of antifreeze gas
IT201900022905A1 (en) * 2019-12-04 2021-06-04 Toscotec S P A STATIC MIXER
CN112902425B (en) * 2019-12-04 2022-08-19 青岛海尔空调器有限总公司 Air guide plate assembly, wall-mounted air conditioner indoor unit and control method thereof

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR609643A (en) * 1926-08-18
FR500283A (en) * 1919-05-31 1920-03-06 Georges Lacroix Device for making mixtures of gases or vapors homogeneous
FR1372655A (en) * 1963-08-09 1964-09-18 Synthese Et D Oxydation Synoxy Method and device for mixing and homogenizing fluids
NL6815942A (en) * 1967-11-09 1969-05-13
US3796209A (en) * 1971-12-21 1974-03-12 A Luft Space heater
US3799734A (en) * 1973-05-03 1974-03-26 J Bailey Combustion device
CH578369A5 (en) * 1974-05-10 1976-08-13 Sulzer Ag
JPS56147619A (en) * 1980-04-21 1981-11-16 Mitsubishi Heavy Ind Ltd Gas mixer
US4495858A (en) * 1982-05-07 1985-01-29 Rocky Mountain Sheet Metal Company, Inc. Fixed blade air blender apparatus

Also Published As

Publication number Publication date
JP2829324B2 (en) 1998-11-25
US5150535A (en) 1992-09-29
DK0421182T3 (en) 1994-11-21
EP0421182A2 (en) 1991-04-10
DE59006684D1 (en) 1994-09-08
JPH03125895A (en) 1991-05-29
EP0421182A3 (en) 1991-11-27
ATE109372T1 (en) 1994-08-15
DE3932837A1 (en) 1991-04-18

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